review material, detail TODOs
make dirs and drafts for all topics
move code from loop_processes to 04_p_gen_server
move code from base to 07_p_e_unit
move code from testing to 07_p_e_unit
move code from http_server to 08_p_cowboy
move code from naive_tcp_server to 10_p_sockets
refactor distributed_chat structure
rename distributed_chat to 15_p_distribution
remove rec2plist
changes in todo